Introduction
Fiat 70-90 Utility Tractor
The Fiat 70-90 is a utility tractor introduced in 1985 as part of the 60-90 and 80-90 series. Designed for general agricultural tasks, this model was built to offer a balance of power and mechanical simplicity for mid-sized farming operations.
Engine and Performance
The tractor is powered by the Fiat 8045.06, a 3.6-liter 4-cylinder liquid-cooled diesel engine. It features direct injection and generates 70 hp (52.2 kW) at a rated speed of 2500 RPM. The engine uses ether injection for cold-start assistance and operates at a 17:1 compression ratio.
Transmission and Drivetrain
The 70-90 offers multiple transmission configurations to suit various field requirements. The standard synchromesh transmission provides 12 forward and 4 reverse gears. Optional configurations include a 12-speed mechanical shuttle or a 20-speed creeper transmission for specialized low-speed tasks. The vehicle is available in both two-wheel and four-wheel drive variants, supported by a 279.4mm dry disc clutch.
Hydraulics and PTO
The hydraulic system utilizes an open-center design, delivering a pump flow of 11 gpm (41.6 lpm) at a pressure of 2702 psi. It is equipped with two or three rear valves. The independent rear PTO operates at 540 RPM, reaching this speed at an engine speed of 2198 RPM.
Hitch and Dimensions
The rear hitch is a Category II type, capable of lifting up to 5212 lbs (2364 kg). The tractor dimensions vary by drivetrain, with a wheelbase of 89.25 inches for the 2WD model and 89.5 inches for the 4WD version. It features power steering and hydraulic wet disc brakes as standard equipment.
Conclusion
The Fiat 70-90 serves as a robust utility tractor suited for diverse farming environments. Its combination of multiple transmission options, a 70 hp engine, and a respectable lift capacity makes it a versatile machine for both primary tillage and secondary field operations.
Production Information of Fiat-Hesston, 70-90
- Original price was $31,100 in 1985
- Utility tractor
| Distributor | Hesston |
|---|---|
| Manufacturer | Fiat |
Dimension and Tires Information of Fiat-Hesston, 70-90
| Rear tread | 55.1 to 78.75 inches [139 to 200 cm] |
|---|---|
| 2WD Wheelbase | 89.25 inches [226 cm] |
| 2WD Front tread | 55.5 to 75.25 inches [140 to 191 cm] |
| 4WD Length | 140.5 inches [356 cm] |
| 4WD Wheelbase | 89.5 inches [227 cm] |
| 4WD Front tread | 64.1 to 77 inches [162 to 195 cm] |
| 2WD Length | 135.25 inches [343 cm] |
| 4WD Ag front | 12.4-24 |
|---|---|
| 2WD Ag front | 7.50-16 |
| 2WD Ag front | 9.5L-15 |
| 2WD Ag front | 7.50-18 |
| 4WD Ag front | 11.2-24 |
| Ag rear | 18.4-30 |
| 4WD Ag front | 13.6-24 |
| Ag rear | 16.9-30 |
| Ag rear(optional) | 16.9-30 |
| Ag rear(optional) | 13.6-38 |
Engine Specifications of Fiat-Hesston, 70-90
- Fiat 8045.06
- Liquid-cooled
- Diesel
- 4-cylinder
| Rated RPM | 2500 |
|---|---|
| Displacement | 220.5 ci [3.6 L] |
| Fuel system | Direct injection |
| Bore/Stroke | 3.937x4.527 inches [100 x 115 mm] |
| Starter volts | 12 |
| Starter | Electric |
| Compression | 17:1 |
| Pre-heating | Ether injection |
| Power | 70 hp [52.2 kW] |
Transmission Information of Fiat-Hesston, 70-90
Transmission variants 1
- Four gears (1-4) in three ranges (I-III) plus reverse range.
| Type | Synchromesh |
|---|---|
| Gears | 12 forward and 4 reverse |
| Clutch | 279.4mm dry disc |
Transmission variants 2
| Type | Mechanical shuttle |
|---|---|
| Gears | 12 forward and reverse |
Transmission variants 3
| Type | Creeper |
|---|---|
| Gears | 20 forward and 8 reverse |
- 12-speed synchromesh
- 12-speed mechanical shuttle
- 20-speed creeper
Mechanical Specs of Fiat-Hesston, 70-90
- Two- or four-wheel drive
- Differential hydraulic wet disc brakes
- Power steering
- Four-post ROPS. Cab optional.
| Final drives | Planetary |
|---|---|
| Differential lock | Mechanical rear |
Power Information of Fiat-Hesston, 70-90
| Rear PTO | Independent |
|---|---|
| Rear PTO Type | 540 (1.375) |
| Engine RPM | 540@2198 |
Hydraulics Specifications of Fiat-Hesston, 70-90
| Type | Open center |
|---|---|
| Pump flow | 11 gpm [41.6 lpm] |
| Pressure | 2702 psi [186.3 bar] |
| Rear valves | 2 or 3 |
Three-Point Hitch of Fiat-Hesston, 70-90
| Rear Type | II |
|---|---|
| Rear lift | 5212 lbs [2364 kg] |
Electrical System of Fiat-Hesston, 70-90
| Ground | Negative |
|---|---|
| Battery volts | 12 |
| Charging system | Alternator |
| Charging amps | 65 |
Where it sits
With 70 HP, the Fiat-Hesston 70-90 sits between 60-90 (60 HP) and 80-90 (80 HP) in Fiat-Hesston's range. Its power puts it in the 53th percentile of 1980s models in our database (2052 machines).
Frequently asked questions
How much horsepower does the Fiat-Hesston 70-90 have?
The Fiat-Hesston 70-90 delivers 70 HP.
What years was the Fiat-Hesston 70-90 produced?
The Fiat-Hesston 70-90 was produced in 1985.
What engine does the Fiat-Hesston 70-90 have?
The Fiat-Hesston 70-90 is powered by a Diesel, 4-cylinder engine.
What transmission does the Fiat-Hesston 70-90 use?
The Fiat-Hesston 70-90 uses a Synchromesh transmission.
Is the Fiat-Hesston 70-90 4WD?
The Fiat-Hesston 70-90 is available in 2WD/4WD.